[PATCH] gas/config/tc-score7.c: Use symbol_get_frag() instead of direct reference to fix segment fault issue

[Chen Gang]

If 'symbol' is 'local_symbol' and already local_symbol_converted_p(),
caller has to use symbol_get_frag() instead of direct reference to get
'frag', or may use invalid pointer to cause segment fault.

The related assembly file for score is below, and related statement is
"beq   .L10".

	.file	"conftest.c"
	.text
	.align	2
	.globl	foo
.LFB0:
	.ent	foo
foo:
	.frame	r2,24,r3, 0		# vars= 4, regs= 4, args= 4, gp= 0
	.mask	0x0000300c,-4
	sw	r13, [r0,-4]+
.LCFI0:
	sw	r12, [r0,-4]+
.LCFI1:
	sw	r3, [r0,-4]+
.LCFI2:
	sw	r2, [r0,-4]+
.LCFI3:
	addi	r0, -8
.LCFI4:
	mv!	r2, r0
.LCFI5:
.LEHB0:
	jl	bar
.LEHE0:
	ldiu!	r12, 1
.L5:
	addri	r6, r2, 4
	mv!	r4, r6
.LEHB1:
	jl	clean
	cmpi.c  r12, 1
	beq    .L10
	j	.L9
.L6:
	mv!	r13, r4
	ldiu!	r12, 0
	j	.L5
.L9:
	mv!	r6, r13
	mv!	r4, r6
	jl	_Unwind_Resume
.LEHE1:
.L10:
	#nop!
	addi	r2, 8
	mv!	r0, r2
	lw	r2, [r0]+, 4
	lw	r3, [r0]+, 4
	lw	r12, [r0]+, 4
	lw	r13, [r0]+, 4
	br!	r3
	.end	foo
.LFE0:
	.globl	__gcc_personality_v0
	.section	.gcc_except_table,"aw",@progbits
.LLSDA0:
	.byte	0xff
	.byte	0xff
	.byte	0x3
	.byte	0x1a
	.4byte	.LEHB0-.LFB0
	.4byte	.LEHE0-.LEHB0
	.4byte	.L6-.LFB0
	.byte	0
	.4byte	.LEHB1-.LFB0
	.4byte	.LEHE1-.LEHB1
	.4byte	0
	.byte	0
	.text
	.size	foo, .-foo
	.section	.eh_frame,"aw",@progbits
.Lframe1:
	.4byte	.LECIE1-.LSCIE1
.LSCIE1:
	.4byte	0
	.byte	0x3
	.string	"zPL"
	.byte	0x1
	.byte	0x7c
	.byte	0x3
	.byte	0x6
	.byte	0
	.4byte	__gcc_personality_v0
	.byte	0
	.byte	0xc
	.byte	0
	.byte	0
	.align	2
.LECIE1:
.LSFDE1:
	.4byte	.LEFDE1-.LASFDE1
.LASFDE1:
	.4byte	.LASFDE1-.Lframe1
	.4byte	.LFB0
	.4byte	.LFE0-.LFB0
	.byte	0x4
	.4byte	.LLSDA0
	.byte	0x4
	.4byte	.LCFI0-.LFB0
	.byte	0xe
	.byte	0x4
	.byte	0x8d
	.byte	0x1
	.byte	0x4
	.4byte	.LCFI1-.LCFI0
	.byte	0xe
	.byte	0x8
	.byte	0x8c
	.byte	0x2
	.byte	0x4
	.4byte	.LCFI2-.LCFI1
	.byte	0xe
	.byte	0xc
	.byte	0x83
	.byte	0x3
	.byte	0x4
	.4byte	.LCFI3-.LCFI2
	.byte	0xe
	.byte	0x10
	.byte	0x82
	.byte	0x4
	.byte	0x4
	.4byte	.LCFI4-.LCFI3
	.byte	0xe
	.byte	0x18
	.byte	0x4
	.4byte	.LCFI5-.LCFI4
	.byte	0xd
	.byte	0x2
	.align	2
.LEFDE1:
	.ident	"GCC: (GNU) 4.10.0 20140530 (experimental)"


Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
---
 gas/config/tc-score7.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gas/config/tc-score7.c b/gas/config/tc-score7.c
index 0a0db2d..8b4206d 100644
--- a/gas/config/tc-score7.c
+++ b/gas/config/tc-score7.c
@@ -5264,7 +5264,7 @@ s7_b32_relax_to_b16 (fragS * fragp)
   else
     {
       if (s->bsym != 0)
-	symbol_address = (addressT) s->sy_frag->fr_address;
+	symbol_address = (addressT) symbol_get_frag(s)->fr_address;
     }
 
   value = s7_md_chars_to_number (fragp->fr_literal, s7_INSN_SIZE);
-- 
1.7.11.7